What muscle tissue composes of hepatopancreatic sphincter?

Define sphincter muscle of hepatopancreatic ampulla. sphincter muscle of hepatopancreatic ampulla synonyms, sphincter muscle of hepatopancreatic ampulla pronunciation, sphincter muscle of hepatopancreatic ampulla translation, English dictionary definition of sphincter muscle of hepatopancreatic ampulla. n. 1. A tissue composed of fibers capable of contracting to effect bodily movement. read more

Contraction of a dome-shaped muscle, for example, the diaphragm, results in flattening, while contraction of a ring-shaped muscle, for example, a sphincter, results in constriction or closure of the opening that the muscle surrounds. read more